Operating-handle for adding-machines.



3; J. BARRETT.

GEERATING HANDLE FOR ADDING MAOHINER APPLICATION FILED APR. 1 1913.

Patented Mar 2, 1915.

V A 23 mvawron WIITNESSES @w W W// BY I A TTORN E Y 2-0 3 i such meanswere present.

' UNITED STATES PATENT ormon.

GLENN J. BARRETT, OF GRAND "RAPIDS, MICHIGAN, ASSIGNOR TO BARRETT ADDINGMACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFDELAWARE.

OPERATING-HANDLE FOR ADDING-MACHINES.

Specification of Letters Patent.

Patented Mar. 2, 1915.

To all whom it may concern:

Be it known that I, GLENN J. BARRETT, a citizen of the United States,residing at Grand Rapids, Michigan, have invented certain new and usefulImprovements in Operating-Handles for Adding-Machines, of which thefollowing is a specification.

My invention relates to improvements in operating handles for addingmachines and other like computing machines, and it has for one of itsobjects to provide a construction in which a yielding means isinterposed between the finger piece of the handle and the point ofconnection of the latter to the operative parts of the machine.

A further object of my invention is to provide a construction in whichsuch yielding means will act as a cushion to relieve the operative partsof the machine of the jar and strain which would result if no Otherobjects and advantages of my invention will be pointed out hereinafterin the specification or will be apparent therefrom.

In order that my invention may be more readily comprehended andunderstood, reference should be had to the accompanying drawing in whichI have illustrated one form of operating handle embodying the same. Itshould be understood, however, that'my invention is not limited to thedetails of construction shown and that changes therein may be madewithin the scope of the claims without departing 'from my saidinvention.

In the drawing:-Figure 1 is a top plan View of a portion of an addingmachine provided with an operating handle embodying my invention; Fig. 2is an inside elevation of such handle and showing its several parts inthe relative positions normally occupied thereby when the handle is notbeing operated; Fig. 3 is an edge elevation of the handle looking towardthe left in Fig. 2; and Fig. 4 is an outside elevation of the handleshowing the relative positions of its parts when said handle has beendrawn forward to operate the machine and with the finger piece drawnforward to the limit of its movement.

Referring to the drawing,-1 designates a member provided with a hub 2having an aXial socket 3 therein to receive the end of a shaft (notshown). The hub 2 is provided with lugs 1 for engagement with a member(not shown) of the operating mechanism of the machine. For a fulldescription of the said hub, shaft and operating member to which the hubis connected, reference is made to Figs. 21 to 26 inclusive and thedescription of the same found in United States Letters Patent No.976,336, issued to me November 22nd, 1910.

The finger piece 5 of the handle is pivoted at 6 to the member 1. Suchpivotal point is situated above and forwardly of the axis of the hub 2.The member 1 is extended rearwardly from the hub 2, as shown at 7.Yielding means, consisting preferably of coiled wire springs 8, areinterposed between the finger piece 5 and the member 1, the oppositeends of said springs being connected respectively to the projecting endof the member 1 and to the middle portion of the finger piece 5. Thenumber of springs employed is immaterial.

The lower rear edge of the finger piece 5 is provided with a notch 10 inwhich a stop lug 11 on the member 1 is situated. Rear ward movement ofthe finger piece toward the rear end of the member 1 under the influenceof the springs 8 is limited by the engagement of the stop 11 with 'theupper edge of the notch 10 while movement of the same in the oppositedirection to distend the said springs is limited by the engagement ofthe said lug with the lower edge of the notch 10. It is apparent thatthe extent of pivotal movement of the finger piece 5 rela-- tive to themember 1 depends upon the length of the notch 10.

In operating the machine, such as an adding machine or other likemachine, the operator catches hold of the finger piece and draws thehandle forward. The springs 8, or other yielding means which may beemployed, are or should be strong enough to cause the part 1 to moveforward in unison or in synchrony with the finger piece until theoperative mechanism of the machine reaches the limit of its forwardmovement and is halted by means of a stop or otherwise. Further forwardmovement of the member 1 is not permitted, but additional forwardmovement of the finger piece 5 is permitted until the lower edge of thenotch 10 strikes the lug 11, as shown in Fig. 4. Such additionalmovement of the finger piece 5 is in opposition to the tension of thesprings 8 and causes the stretching of the same as shown in said Fig. 4.These springs 8 (or their equivalent) constitute cushions to preventunnecessary shocks and jars to the operating mechanism of the machine,such as would occur were there no cushioning means between the fingerpiece and the movement of sult of this is to cause a sh ht dwell of theoperative parts of the machine at the endof each forward stroke of thehandle which is desirable in rapid work because it gives the settingmechanism as well as the-other mechanism an opportunity to settle andcease vibrating.

The releasing key 15 is provided with a pin 16 at its upper end winch isin slidable engagement with a curved slot 17 in the finger piece 5. Thelower end of the key 15 is pivotally connected to a release lever 18extending rearwar'tlly from a sleeve 19 retatably mountedvupon the hub2. The said lever 18 and sleeve 19 are hcld'normally'in the positionshown in the drawing by means of a spring 520 connected to the saidlever at 21 and to the lingo." piece 5 at 22. The sleeve 19 is providedwith a projection 23 the purpose, function and operation oi which arethe same as that of the projection 89% on the sleeve 239i shown in latent No. 976,336, aforesaid. Reference may be had to said patent for afull description of the releasing and resetting mechanism.

I claim 1. An operating handle for a computing machine comprising amember having connection with the operativemechanism of such machine, afinger piece oscillatably supported on said member, elastic cushioningmeans interposed between said member and said linger piece, and meansfor permitting limited movement of said finger piece with respect tosaid member. 2. An operating handle for a computing machine comprising amember having connection with the operative. mechanism of such machine,a linger piece oscillatably supported on said member, a spring-actingmeans having connection with said linger piece and said memberwhich'means, when the linger piece is moved forwardly, causescorresponding movement of said member, and thereafter permitsindependent forward movement 01 said finger piece.

the period of the.

described, the combination of a linger piece .3. An operating handle fora computing 1 machine comprising a member having con nection with theoperative mechanism of such machine, a finger piece oscillatably.supported on said member, and cushioning means interposed between saidmember and said finger piece andhaving connection with said member andsaid finger piece.

.- '4. An operating handle for a. computing machine comprising a memberhaving connection with the operative mechanism of such machine,Ia-finger iece pivotally connected to the said mem er, and cushioningmeans interposed between and having connection with said member and saidfinger piece to resist forward movement of the said finger piece inrelation to the said member.

5. In an operating handle for a computing machine the combination ofamember having connection with the operative mechanism of such machine,the said member having rearwardly and 'forwardl extending portions, afinger piece pivote to the forwardly extended portion of the saidmember, and a cushioning spring having connection at one'end to therea'rwardly extended portion of the said member and at its other end tothe said finger piece.

6. In an operating handle for computing machines, the combination of amember having a hub thereon, a finger piece pivotally connected to thesaid member forwardly of the said hub, cushioning means interposedbetween the said finger piece and the said member, the said cushioningmeans having connection with the said finger piece and with a portion ofthe said member rearward of the said hub.'.

7 In an operating handle of the character having a notch at the lowerend of one of i edges, :1. member to which the said ling pieceispivoted, the said member having a ug situated in the saidnotch, thelength of the latter being greater than the thickness or thesaid lug,yielding means interposed between the said finger piece and the saidmember and permitting relative movement between the said finger pieceand the said member, the extent of such movement depending upon the lenth of the said notch.

8. In an operating handle for a computing machine,- the combination of amember provided witha hub having connection with the operating mechanismof such machine, a.

linger-piece having pivotal connection with the sm member, means forresisting pivotal movement of the said finger piece with rela tion tothe said member, a release kev having slidablo connection with the saidfinger pioce, a sleeve rotatably supported upon the said hub, and arelease lever projecting tron the said hub and having connection with llsaid release key.

9. In tin-operating handle for a computing 7 machine, the combination ofa member provided with a hub having connection with the operating'mechanism of such machine, a finger piece having pivotal connectionWith the said member, means for resisting pivotal movement of the saidfinger piece with relation to the said member, a release key havingslidable connection with the said finger piece, a sleeve rotatablysupported upon the said hub, a release lever projecting from the saidsleeve and having connection With the said release key, and a yieldingconnection between the said release lever and the said finger piece.

10. In an operating handle for computing machines, the combination of apivotally supported member, a finger-piece pivotally connectedfto thesaid member forwardly of the pivotal axis of the latter, cushioningmeans interposed between the said finger-piece and the said member, thesaid cushioning means having connection with the said finger-piece andwith a portion of the said member rear- Ward of the pivotal axis of thelatter.

In testimony that I claim the foregoing as my invention, 1' havehereunto signed my name this 15th day of April, A. D. 1913.

GLENN J. BARRETT.

